blackLines.
The common solution of wireframe parsing is to achieve endpoint heatmaps at first, and then verify valid endpoint pairs through verification modules [1]}, [2]}, [3]}. However, these wireframe parsers are unable to produce reliable endpoint heatmaps from corrupted images as discussed in [4]}. Thus we employ the masking augmented wireframe parser –LSM-HAWP [4]} to extract lines from masked images.
Specifically, we use anti-aliased lines to link endpoint pairs to achieve the ground truth line priors \(\mathbf {\hat{P}}_l\) .
For simplicity, we directly mask ground truth priors \(\mathbf {\hat{P}}_l\)  as masked ones \(\mathbf {P}_l\)  for training.
During the inference, LSM-HAWP can be well generalized to masked images as illustrated in Fig. REF . The reconstructed lines \(\mathbf {\tilde{P}}_l\)  are also in grayscale, so we can optimize them with BCE.
